JPS5839470B2 - Equipment for supplying and distributing gasification aid to a rotating grate generator - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention is applicable in gas production wherever a gasification aid is added to the process via a rotating grate.

A special area of application is bed pressure generators.

In rotary grate generators, the gasification aid is normally supplied to the reaction fuel bed via the rotary grate, which is also the ash evacuation mechanism.

The rotary grate is a conical hollow body, usually made of heat-resistant cast steel, into which the gasification auxiliary is supplied via one or more centrally mounted pipes. The reaction chamber is then reached through an opening in the conical jacket of the grate.

Particularly in the case of large reactors, such as in forced gas generators, where the opening provided for installing the grate in the reactor is essentially smaller than the diameter of the reactor, this grate has several internal parts, In some cases, it is composed of multiple internal parts.

In order to distribute the gasification aid through the openings in the jacket of the grate and to carry out the process optimally, the hollow body formed by the internal parts is in close contact with the abutment surface during operation.

In this case, it must be ensured that uncontrolled leakage of the gasification aid that has an adverse effect on the process cannot occur.

However, due to the high thermal and mechanical loads on the rotating grate, the grate portion often deforms, creating significant voids in the abutting surfaces through which the gasification aid flows out.

Force gasification aid to flow out evenly from all slits In high-power generators, there is a large pressure difference between the inside of the grate and the reactor, so even if there is a small gap that occurs even when installed, gasification will not occur. The entire auxiliary distribution is disturbed.

The supply of gasification auxiliary agent is thus no longer uniform over the entire reactor cross-section, which creates a serious disturbance during generator operation that can only be removed by replacing the rotating grate.

Therefore, complex sealing of the grate section has already been proposed, but this has the disadvantage that the sealing becomes incomplete during long periods of operation.

Furthermore, the example is DD-WP C10j/198286
proposed that the thermal stress of the rotating grate be reduced to an extent that the grate portion would not be deformed by using a protective film made of a heat-resistant material.

In addition to changing the coefficient of friction between the ash and the rotating grate, which has a negative effect on ash evacuation, this protective film becomes ineffective under prolonged exposure to very hot ash.

This is because the hollow chamber inside the rotating grate is large, so the velocity of the gasification auxiliary agent is low, and therefore the thermal conductivity is also low, and no difference occurs in the thermal stress of the rotating grate.

The object of the present invention is to equalize the gasification aid supply to the deposited layer and to prevent the formation of preferential flow passages in the deposited layer;
The goal is to increase the output of the gas generator.

The object of the invention is to supply the gasification auxiliary through the rotary grate in such a way that even if the rotary grate is deformed, the outflow of the gasification auxiliary takes place only at defined points, thus eliminating the disadvantages of current operation. That's true.

This prevents operational disturbances and increases the period of regular maintenance of the rotating grate.

According to the invention, this task is achieved by providing a rotatably mounted distributor head inside the rotary grate, which communicates directly with the gasification auxiliary outlet or with the distribution chamber, which is individually arranged in the rotary grate section, via an elastic feed pipe. The problem is solved by setting the following.

To provide a seal between the distributor head and the gasification aid supply tube, a backing is provided which is configured to ensure a seal even under radial forces and movements.

The gasification auxiliary agent enters the distributor head through the central feed pipe and is guided from there via elastic feed pipes into the individual outlets or into the distributor chambers provided in the individual grate sections, which distribute the It enters the reaction chamber from the chamber through the outlet.

This distribution of the gasification auxiliary eliminates the migration of the gasification auxiliary from the rotating grate to the fixed bed only at certain points and the formation of uneven flow channels with all the known disadvantages. guaranteed to be done.

At the same time, the two functions of the grate, the gasification aid distribution mechanism and the discharge mechanism, are separated.

Installation of the device can be easily carried out during installation of the grate inside the reactor.

A distributor head 2 is rotatably arranged on the gasification aid supply pipe 1.

The sealing of the distributor head 2 to the supply pipe 1 is achieved by banking 3
It is carried out by

The supply of gasification auxiliary agent to the outlet 4 of the rotating grate section 6 or to the distributor chamber 5 takes place via a supply pipe 7, in which a bellows 8 may be arranged to increase the elasticity.

For installation reasons, the connection between the supply pipe 7 and the outlet 4 or the distributor chamber 5 is designed to be removable.

The connection with the distributor head 2 is also removable.

For stress relief of the feed pipe γ, the distributor head 2 is coupled to a drive shaft 9 of a rotating grate with a wave 10 transmitting torque to overcome the friction in the backing 3.

[Brief explanation of the drawing]

The accompanying drawing shows a sectional view through the center of a rotating grate generator according to the invention. 1... Gasification aid supply pipe, 2... Throat to distributor, 4... Outlet, 5... Distributor chamber, 6... ...Rotating grate part, 7...
supply pipe.

Claims (1)

[Claims] 1 gasification auxiliary distributor chamber 5 arranged via an elastic feed pipe 7 in the gasification auxiliary outlet 4 or separately in the rotating grate section 6
A rotatable (mounted distributor head 2) in direct communication with
1. A device for supplying and distributing a gasification auxiliary agent to a rotating grate generating furnace, characterized in that a gasification auxiliary agent is provided inside the rotating grate.